Assessment of ovarian function in the African elephant (Loxodonta africana) by measurement of 5α-reduced progesterone metabolites in serum and urine
Abstract 10.1002/(SICI)1098-2361(1997)16:33.3.CO;2-6 We have previously shown that 5α-pregnane-3,20-dione (5αDHP), and 5α-pregnane-3-ol-20-one (5α-P-3-OH) are the major luteal and circulating progestins in the African elephant. Therefore, the aim of the present study was to determine (1) circulating levels and patterns of secretion of 5α-DHP in relation to progesterone (P4) throughout the ovarian cycle, (2) the presence and […]
Selected aspects of female white-faced saki (Pithecia pithecia) reproductive biology in captivity
Abstract 10.1002/zoo.1430140506.abs Little is known regarding the reproductive biology of the white-faced saki. Although sakis have been in zoos since the mid-1970s, little attention has been paid to the reproductive biology of this threatened species. This study describes the results of a 3-year study of the reproduction of the white-faced saki in captivity. Using noninvasive […]
Monitoring ovarian function in scimitar-horned oryx (Oryx dammah) by measurement of fecal 20α-progestagen metabolites
Abstract 10.1002/zoo.1430140305.abs The feasibility of monitoring ovarian function in scimitar-horned oryx (Oryx dammah) by measurement of fecal 20α-progestagens was investigated. Fecal samples were collected daily or on alternate days over a 4–11 month period from five oryx during natural (n = 4) or synthetic PGF2α (cloprostenol)-controlled (n = 1) cycles. Of the four oryx undergoing […]
Assessing reproductive cycles and pregnancy in cheetahs (Acinonyx jubatus) by vaginal cytology
Abstract 10.1002/zoo.1430110303.abs Vaginal cytology was used to monitor ovarian cycles, two pregnancies, and three pseudopregnancies. Vaginal smears were collected two or three times per week from three adult females; smears plus blood samples were collected once per week from a fourth, adolescent female. Mean cycle lengths, based on intervals between onset of leukocyte infusions, were […]